Practice Balancing Chemical Equations

Pick an equation, balance it, and the check your work with the Solution page.

HBr + KOH → KBr + H2O  (Solution)
HF + KOH → KF + H2O   (Solution)
SO2 + O2 + H2O → H2SO4  (Solution)
AgNO3 + KI → AgI + KNO3   (Solution)
AgNO3 + Na3PO4 → Ag3PO4 + NaNO3  (Solution)
AgNO3 + NaOH → AgOH + NaNO3  (Solution)
AgNO3 + NaOH → NaNO3 + Ag2O + H2O  (Solution)
Al + CuCl2 → AlCl3 + Cu  (Solution)
Al + Fe2O3 → Al2O3 + Fe  (Solution)
Al + HNO3 → Al(NO3)3 + H2   (Solution)
Al2O3 + H2SO4 → Al2(SO4)3 + H2O  (Solution)
Ba + O2 → BaO  (Solution)
Ba(NO3)2 + Na2SO4 → BaSO4 + NaNO3  (Solution)
BaCl2 + H2SO4 → BaSO4 + HCl  (Solution)
Be + O2 → BeO  (Solution)
C25H52 + O2 → CO2 + H2O  (Solution)
C3H4 + O2 → CO2 + H2O  (Solution)
Ca + H2SO4 → CaSO4 + H2  (Solution)
Ca + H3PO4 → Ca3(PO4)2 + H2  (Solution)
Ca + HCl → CaCl2 + H2  (Solution)
Ca + HNO3 → Ca(NO3)2 + H2  (Solution)
Ca(OH)2 + H2SO4 → CaSO4 + H2O  (Solution)
CaO + H2O → Ca(OH)2  (Solution)
CaO + H2SO4 → H2O + CaSO4  (Solution)
CaO + H3PO4 → Ca3(PO4)2 + H2O  (Solution)
CaO + HCl → CaCl2 + H2O  (Solution)
CaO + HNO3 → Ca(NO3)2 + H2O  (Solution)
CH2O + O2 → CO2 + H2O  (Solution)
CH3CH3 + O2 → CO2 + H2O  (Solution)
CH4 + Cl2 → CH2Cl2 + HCl  (Solution)
CuCl2 + Na2S → CuS + NaCl  (Solution)
CuCl2 + NaOH → Cu(OH)2 + NaCl  (Solution)
CuO + HCl → CuCl2 + H2O  (Solution)
CuSO4 + NaOH → Cu(OH)2 + Na2SO4  (Solution)
Fe + H2O → FeO + H2  (Solution)
Fe + H2SO4 → FeSO4 + H2  (Solution)
FeCl3 + AgNO3 → AgCl + Fe(NO3)3  (Solution)
FeO + CO → Fe + CO2   (Solution)
FeS + HCl → FeCl2 + H2S  (Solution)
H2 + O2 → H2O  (Solution)
H2S + O2 → H2O + SO2  (Solution)
H2S + SO2 → H2O + S  (Solution)
H2SO4 + Mg(OH)2 → H2O + MgSO4   (Solution)
H2SO4 + Zn → ZnSO4 + H2  (Solution)
H3PO4 + KOH → K3PO4 + H2O  (Solution)
HBr + Fe(OH)3 → FeBr3 + H2O   (Solution)
HCl + KOH → KCl + H2O  (Solution)
HF + Ba(OH)2 → BaF2 + H2O  (Solution)
HF + NaOH → NaF + H2O  (Solution)
Hg + O2 → HgO  (Solution)
HNO3 + Al(OH)3 → Al(NO3)3 + H2O  (Solution)
HNO3 + CaCO3 → H2O + CO2 + Ca(NO3)2  (Solution)
HNO3 + KOH → KNO3 + H2O  (Solution)
HNO3 + Mg → Mg(NO3)2 + H2  (Solution)
HNO3 + NaOH → NaNO3 + H2O  (Solution)
HNO3 + Zn → Zn(NO3)2 + H2  (Solution)
K + H2O → KOH + H2  (Solution)
K + O2 → K2O  (Solution)
KNO3 + H2SO4 → KHSO4 + HNO3  (Solution)
KOH + CO2 → KHCO3  (Solution)
Li + Cl2 → LiCl  (Solution)
Li + N2 → Li3N  (Solution)
Li + O2 → Li2O  (Solution)
Mg + H3PO4 → Mg3(PO4)2 + H2  (Solution)
Mg + HNO3 → Mg(NO3)2 + H2  (Solution)
MgO + H2O → Mg(OH)2  (Solution)
N2 + O2 → NO2  (Solution)
N2O → N2 + O2  (Solution)
N2O5 + H2O → HNO3  (Solution)
Na + H3PO4 → Na3PO4 + H2  (Solution)
Na2CO3 + CaCl2 → NaCl + CaCO3  (Solution)
Na2CO3 + H2O → NaOH + CO2  (Solution)
Na2CO3 + H3PO4 → H2O + CO2 + Na3PO4  (Solution)
Na2CO3 + HCl → NaCl + H2CO3  (Solution)
Na2CO3 + HCl → NaCl + H2O + CO2  (Solution)
NaBr + Cl2 → NaCl + Br2   (Solution)
NaClO3 → NaCl + O2  (Solution)
NaHCO3 + HC2H3O2 → NaC2H3O2 + CO2 + H2O  (Solution)
NaOH + Cl2 → NaCl + NaClO + H2O  (Solution)
NaOH + CO2 → Na2CO3 + H2O  (Solution)
NaOH + FeCl3 → Fe(OH)3 + NaCl  (Solution)
NaOH + H3PO4 → NaH2PO4 + H2O  (Solution)
NH4Cl + NaOH → NH3 + H2O + NaCl  (Solution)
NH4NO3 → N2 + O2 + H2O  (Solution)
NO + O2 → NO2  (Solution)
NO2 + H2O → HNO3 + NO   (Solution)
P4 + O2 → P2O5  (Solution)
Pb(NO3)2 + Fe2(SO4)3 → Fe(NO3)3 + PbSO4  (Solution)
Pb(NO3)2 + KI → KNO3 + PbI2   (Solution)
PbCl2 + K2SO4 → PbSO4 + KCl  (Solution)
S + O2 → SO2  (Solution)
S + O2 → SO3  (Solution)
SO2 + NaOH → NaHSO3  (Solution)
Zn + AgNO3 → Ag + Zn(NO3)2   (Solution)
Zn + H2O → Zn(OH)2 + H2  (Solution)
Zn + HCl → ZnCl2 + H2  (Solution)
Zn + O2 → ZnO  (Solution)



More Challenging Equations


C12H22O11 + O2 → CO2 + H2O  (Solution)
C6H5COOH + O2 → CO2 + H2O  (Solution)
CaCl2 + Na3PO4 → Ca3(PO4)2 + NaCl   (Solution)
CH4O + O2 → CO2 + H2O  (Solution)
Cu + HNO3 → Cu(NO3)2 + NO2 + H2O  (Solution)
CuSO4 + KI → CuI + I2 + K2SO4  (Solution)
Mg(NO3)2 → MgO + NO2 + O2  (Solution)
Mg(OH)2 + HCl → MgCl2 + H2O  (Solution)
Mg(OH)2 + HNO3 → Mg(NO3)2 + H2O  (Solution)